abidock_mvx 3.1.0

Full-Featured MultiversX blockchain SDK for Dart/Flutter.

Changelog

All notable changes to abidock_mvx are documented here. We follow Semantic Versioning and the structure recommended by Keep a Changelog.

3.1.0 -- 2026-08-13

Corrects argument encoding for variadic, counted-variadic and multi<...>, makes Balance.fromEgld exact, reaches the gas allowances and estimator that were previously unreachable, and puts every exception under one base type. Adds the skills/ knowledge base. One source-breaking removal, AbiNotFoundException, is listed under Removed.

Contract call arguments

• A trailing variadic<...> accepts either form. Each trailing argument was validated against the item type, so passing a whole VariadicValue never matched. A single VariadicValue and flat trailing items now encode identically.
• counted-variadic<...> emits its u32 count, omitted on the endpoint path, so the contract read the first item as the count.
• multi<...> works in any input position. It was treated as variadic on the multi< prefix and the text between the brackets re-parsed as one type name, raising Unknown type: TokenIdentifier,BigUint. A multi<A,B> is a fixed-arity group.
• multi<...> expands to one wire slot per member. The controller's encoder had no branch for it and concatenated the members into a single argument.

Balance

Balance.fromEgld(num) is exact for decimal literals. It converted through a fixed-point rendering of the double, so 0.1 produced 100000000000000006 and 0.3 produced 299999999999999989. Binary-representable values were unaffected, which is why the error was easy to miss.

Gas, configuration and status

• Guardian and relayer gas allowances apply even when an explicit gas limit is given, and an IGasLimitEstimator supplied to SmartContractController is consulted. Both were unreachable: the controller returned as soon as a limit was present, and contract calls always supply one.
• Proxy entrypoints forward their NetworkProviderConfig. ProxyNetworkEntrypoint and the Devnet/Testnet/Mainnet presets built their provider without it, so client name, headers, timeout, retry, throttle and cache had no effect; applying a clientName also dropped the throttle and cache policies.
• TransactionOnNetwork.isCompleted and TransactionStatus.isCompleted agree; they diverged for not-executable-in-block. The terminal-state predicate is isFinal.
• An empty data no longer discards token transfers. createTransactionForTransfer guarded on non-empty data but branched on non-null, so Uint8List(0) alongside transfers produced a native-EGLD transaction and the transfers vanished silently.

Errors

• Every exception the SDK raises descends from AbidockException, so one on AbidockException clause catches them all. Nine types implemented Exception directly and escaped it.
• AbiNotFoundException removed — it could never be raised. An ABI-less controller asked for an ABI throws StateError, as the equivalent factory methods already did.

Removed

Removed	Use instead
AbiNotFoundException	StateError -- raised when an ABI-less controller is asked for one

Tooling

• abidock --help, -h and help all print usage and exit successfully.
• abidock generate <abi> <output> <name> honours its arguments. The command looked for a config file first, so an abidock.yaml in the working directory made it regenerate that config's contracts and discard the three arguments silently. Precedence is now --config, then explicit arguments, then a discovered config.
• Event polling no longer retries a rate-limited request indefinitely. After its bounded retries it skips the poll and resumes on the next cycle, as the log message always claimed.

Docs

• New skills/ knowledge base: 14 task-oriented reference files covering the public API, wallets and signing, transactions, contracts, ABI codecs, codegen, providers, ESDT, events, errors, Supernova and pitfalls, indexed by skills/README.md. AGENTS.md at the repository root points agents at it.
• The error-handling page no longer documents AbiNotFoundException.

Migration from 3.0.0

Bump to ^3.1.0. The only source-breaking change is AbiNotFoundException: replace any on AbiNotFoundException clause with on StateError. Expect higher gas limits on guarded and relayed contract calls, because those allowances now apply when you pass an explicit limit.

3.0.0 -- 2026-08-13

Lands the top-level NetworkEntrypoint façade, reshapes the generated DTO surface, and corrects a set of defects that produced transactions the chain rejects. Removed API is listed under Removed; each entry has a working replacement. Migration is mostly mechanical: regenerate, swap String token-identifier/address fields for the wrapper types, and walk the compiler errors.

Minimum SDK is now Dart 3.13.

Entrypoints

New lib/src/entrypoints/network_entrypoint.dart, exported from the package barrel.

• NetworkEntrypoint / DevnetEntrypoint / TestnetEntrypoint / MainnetEntrypoint -- API-backed (indexer).
• ProxyNetworkEntrypoint / DevnetProxyEntrypoint / TestnetProxyEntrypoint / MainnetProxyEntrypoint -- Gateway-backed (chain-go Proxy).
• EntrypointUrls constants for the official public hosts.

Each entrypoint caches a single NetworkProvider and exposes createSmartContractController, createTransfersFactory, createTokenManagementFactory, createDelegationFactory, createMultisigFactory, createValidatorsFactory, createGovernanceFactory, create*Controller and createTransactionWatcher. Documented at docs/docs/network/entrypoints.md.

Auto-gas signing bug fixed in generator

Generated auto-gas calls signed the transaction and then replaced its gas limit with copyWith(newGasLimit:), which invalidated the signature. The generator now builds an unsigned probe via SmartContractCallFactory, simulates gas, and calls controller.call once with the final value, so signing happens against the gas that ships. Regenerate existing output to pick up the fix.

Type-mapper changes (generated DTO breaking change)

The codegen TypeMapper now emits the wrapper types instead of String:

ABI type	Old Dart type	New Dart type
Address	String	Address
TokenIdentifier	String	TokenIdentifier
EsdtTokenIdentifier	String	TokenIdentifier
EgldOrEsdtTokenIdentifier	String	EgldOrEsdtTokenIdentifier
BigFloat	(unsupported)	double
ManagedByteArray<N>	(unsupported)	Uint8List
MultiValue<...>	(unsupported)	record (T1, T2, ...)

Generated struct fields, query return types and call arguments shift accordingly. Where pair.firstToken gave a String it now gives a TokenIdentifier -- use .value for the raw string.

Transactions the chain rejected

• ESDT built-in functions are addressed to the sender, not the ESDT system contract, because they execute against the caller's own account: ESDTNFTCreate, ESDTLocalMint, ESDTLocalBurn, ESDTNFTUpdateAttributes, ESDTNFTAddQuantity, ESDTNFTBurn, ESDTModifyRoyalties, ESDTSetNewURIs, ESDTModifyCreator, ESDTMetaDataUpdate, ESDTMetaDataRecreate, ESDTNFTAddURI, ESDTNFTUpdate, ESDTNFTRecreate. The other 23 endpoints still target the system contract.
• Governance contract address corrected from …0006ffff to …0003ffff. Every governance transaction went to an account that is not a contract, and createTransactionForNewProposal stranded its 1000 EGLD deposit there.
• Validator operations target the validator contract (…0001ffff) instead of the staking contract (…0000ffff), which only accepts calls from the validator contract — wallet-signed staking transactions could never succeed.
• changeConfig encodes minQuorum, minVetoThreshold and minPassThreshold as ASCII decimal, which is what the contract parses; they were sent as big-endian integers.
• clearEndedProposals gas scales with the proposer count (gasLimit + n * gasLimit) instead of a flat limit.
• registerAndSetAllRoles and registerDynamic emit the mandatory token type, which both omitted; registerAndSetAllRolesDynamic appends numDecimals only for META.
• Token properties are written in full. Only enabled flags were emitted, but a missing pair does not mean "disabled" — the contract creates tokens with canUpgrade and canAddSpecialRoles already on and overrides only the properties the arguments name, so TokenProperties(canUpgrade: false) produced an upgradable token and controlChanges could not switch a property off. The fungible issue endpoint omits canTransferNFTCreateRole, which is not part of its argument list.
• Factories add the data-movement gas term (minGasLimit + gasLimitPerByte * data.length) on top of execution gas. Token-management, delegation and the guardian builders shipped the bare execution limit, under-charging by an amount that grew with the payload.

Signing and relayed transactions

• innerTransactions no longer reaches the signing payload. The field is not part of the chain's transaction format, so every relayed transaction was signed over a payload the node cannot reconstruct and the signature could not verify. Removed from Transaction entirely.
• RelayedTransactionsFactory implements flat relayed v3: one transaction carrying relayer and relayerSignature. Attach the relayer with applyRelayer before signing, then sign with the sender and the relayer in either order.
• Transaction.serializeForSigning() applies the Keccak digest when the hash-signing option bit is set. signWith, signAsRelayer and signAsGuardian signed the raw payload, producing signatures the chain rejects.
• UserPublicKey.verify returns false for malformed signatures instead of throwing; the result was returned without await inside the try, so catch never saw asynchronous errors.
• Account.fromMnemonic disposes the mnemonic after key derivation completes, not before.

Outcome parsers

TokenManagementOutcomeParser reads the logs of the transaction's smart-contract results as well as its own. freeze, unFreeze, wipe, setSpecialRole, unSetSpecialRole and the local mint/burn pair act on another account by forwarding a built-in call, so their events land on the result rather than the transaction. Every such parse returned an empty list, and a signalError reported on a result was invisible — a failed transaction parsed as a successful empty outcome.

Network providers

• TransactionOnNetwork.fromApiResponse reads smart-contract results from results; they were always null.
• relayedVersion is a String? ('v1', 'v2', 'v3'); it was parsed as an integer and threw on every relayed transaction.
• Corrected routes: transaction simulation, guardian data, and the gateway's non-fungible token listing, which pointed at a path no node or proxy serves.
• Guardian fields are read from the flat account payload, and the provider sends the query flag required to return them.
• GatewayNetworkProvider accepts a NetworkProviderConfig, so user agent, timeout and retry policy apply to it as well.
• Request throttling and GET-response caching are available through NetworkProviderConfig, both off by default.

Supernova

Block timestamps move from seconds to milliseconds at the Supernova activation epoch without a field rename, and the unit differs per route. Reading such a value as seconds yields a date in the year 57,000.

• TransactionOnNetwork exposes timestampMs alongside timestamp, plus executedAt, which normalises either unit by magnitude.
• NetworkStatus exposes blockTimestamp and blockTimestampMs; block, hyperblock, account and token models expose their millisecond counterparts.
• Block models carry lastExecutionResultHash and lastExecutionResultNonce, which asynchronous execution reports separately from the block itself.
• miniblockType is read with the spelling the node emits.
• AccountAwaiter polls every 600 ms, matching sub-second block times.
• Added the reward-reverted status.

ABI

• The type names TokenId, NonZeroBigUint, Payment and FungiblePayment resolve. Contracts referencing them carry no definition in types, so such an ABI failed to load.
• Enum variant payload fields are parsed, so fielded enums decode rather than being truncated.
• specificType and the contract's internal method name are surfaced on the endpoint and parameter models; specificType distinguishes a u64 holding milliseconds from one holding seconds.
• Corrected ExplicitEnumValue.toBytes() and the counted-variadic argument convention.
• BigFloat has no portable wire form; encoding, decoding and toBytes throw. The type exists so that ABIs mentioning it still load.

Removed

Each entry has a working replacement; none of the removed members could produce a valid result.

Removed	Use instead
SignableMessage	Message + MessageComputer.computeBytesForSigning
ValidatorSigner(secretKey), ValidatorSigner.fromPem	ValidatorSigner.custom(signFn)
TransactionStatus.recalled, isRecalled	— status does not exist on chain
NetworkConfig.gasPriceModifierString	gasPriceModifier
functionCallHexParts on the multisig builders	functionCall: <TypedValue>[...]
RelayedTransactionsFactory.createRelayedTransaction	applyRelayer, then sign
createTransactionForDelegatingVote	— callable only by a contract
createTransactionForUnsettingBurnRoleForAll	createTransactionForUnsettingBurnRoleGlobally
Transaction.innerTransactions	— not part of the transaction format

Public API

NetworkProviderConfig, RetryPolicy, UserAgent, GuardianData, Guardian, CodeMetadata, EsdtTokenPaymentType and EgldOrEsdtTokenPaymentType are exported. They were declared public but unreachable from the package barrel, which made the configuration surface unusable from outside the package.

Tooling

• Generated code is formatted for the language version of the SDK running the generator. The generator wrote unformatted Dart, so any project with a dart format --set-exit-if-changed check failed on its own generated sources.
• The ABI validator no longer warns on keys that are not part of the ABI schema, which broke --fail-on-warnings for valid ABIs.
• Integration tests that perform live network calls are tagged and skipped by default; run them with dart test -P integration.
• Added dart_style and pub_semver dependencies.

Generator internals

• bin/codegen/utils/imports_formatter.dart deleted. Import ordering now lives inside each generator via the existing import_manager / per-file _writeSortedImports helpers.
• BarrelGenerator no longer dual-tracks event-model file names; the helper computes the suffix once.
• Reserved-keyword sanitisation consolidated through NameSanitizer; the duplicate list in event_models_generator.dart has been removed (the keyword set is now sourced from name_sanitizer.dart).

Docs

• New page: network/entrypoints.md covering all eight entrypoint classes plus the gasLimitEstimator injection point.
• Sidebar moved entrypoints under the existing Network category.
• Codegen and smart-contract pages updated to show the new generator output (Address/TokenIdentifier wrappers, autogas probe pattern).

Migration

1. Move to Dart 3.13 or newer, then dart pub upgrade abidock_mvx (or bump to ^3.0.0 in pubspec.yaml).
2. Regenerate any committed codegen output. Diffs to expect:
   • Struct fields that previously held String for Address / TokenIdentifier now hold the wrapper type.
   • Generated *Unsigned call helpers are unchanged on the wire; the signed helpers now do the probe-then-sign dance internally.
   • Generated files are formatted.
3. Walk the call sites; the compiler will flag every String/Address mismatch, every removed member listed under Removed, and relayedVersion moving from int? to String?.
4. Re-check any hard-coded gas limits. Factory-produced limits now include the data-movement term and are higher than before.
5. Re-check anything that reads TransactionOnNetwork.timestamp directly; prefer executedAt.
6. (Optional) Swap ApiNetworkProvider(...) + factory plumbing for DevnetEntrypoint() / MainnetEntrypoint() etc.

1.2.0 -- 2026-04-17

Public-key encryption now actually uses X25519

PubkeyEncryptor and PubkeyDecryptor were feeding raw Ed25519 key bytes into X25519 APIs. The code round-tripped with itself (both sides made the same mistake), but the ciphertext couldn't be decrypted by anything else — mx-sdk-js-core, NaCl, libsodium, or any tool that does real X25519.

This release adds the two standard Curve25519 key conversions, both exposed under lib/src/wallet/crypto/curve25519_conversion.dart:

• ed25519PublicKeyToX25519(edPub) — the Bernstein/RFC-7748 birational map u = (1 + y) / (1 - y) mod (2^255 - 19).
• ed25519SeedToX25519SecretKey(seed) — SHA-512(seed)[0:32] followed by RFC 7748 clamping, matching libsodium's crypto_sign_ed25519_sk_to_curve25519.

The encryptor and decryptor now call through these on both sides, so the wire format is real X25519-XSalsa20-Poly1305 and will interoperate with any standard implementation.

Breaking change

Anything encrypted with 1.1.0 or earlier PubkeyEncryptor cannot be decrypted by 1.2.0, and vice versa. The serialized schema (X25519EncryptedData) is unchanged — only the math behind it is now correct.

1.1.0 -- 2026-04-16

This release closes a pile of wire-format mismatches against the chain, fills in the protocol coverage that was missing (staking, governance, relayed-v3, SC lifecycle), and tightens the concurrency primitives that sit between the SDK and the network. There are a handful of breaking changes, all listed at the bottom — most projects won't notice them.

Wire format

Transaction hashing now matches the chain byte-for-byte. The culprits were subtle: protobuf zero-values were emitted as a single zero byte instead of the sign+magnitude pair, Option<T> top-level encoding dropped its marker, signed BigInt nested encoding lost its sign extension on -129 and friends, and hash-signed transactions were being fed the raw JSON bytes instead of the Keccak digest. The message-signing prefix went back to the canonical \x17Elrond Signed Message:\n — signatures need to interop with existing wallets and hardware devices, so renaming to "MultiversX" wasn't an option.

Network provider

Endpoints that were quietly wrong got fixed: bulk-send, VM query, transaction status, NFT nonce padding (even-length hex), process-status vs transaction endpoint on Gateway, the fungible-vs-NFT filter split on _parseEsdts, account storage key routing, and block-by-nonce shard prefixing. The circuit breaker now wraps smart-contract queries too. ApiNetworkProvider.estimateTransactionCost throws UnsupportedError instead of pretending to work.

SendTransactionsResult now returns per-transaction outcomes (SendTxSuccess / SendTxFailure with the node's rejection reason) alongside the aggregate counts, so bulk submission can drive a resubmission loop properly.

New protocol coverage

• SmartContractTransactionsFactory for deploy / upgrade / change-owner / claim-developer-rewards.
• StakingTransactionsFactory for the direct-staking system SC (stake, unStake, unBond, claim, changeRewardAddress, changeValidatorKeys, unJail, reStakeUnStakedNodes).
• GovernanceTransactionsFactory for proposing, voting, delegate-voting, closing, and claiming accumulated fees.
• RelayedTransactionsFactory for relayed-v3. Transaction gained an innerTransactions field and the protobuf serializer emits them on field 18.
• TransactionDecoder learned the matching sealed subclasses: ContractDeploy, ContractUpgrade, ContractChangeOwner, ClaimDeveloperRewards, RelayedV3Transaction.
• TokenManagementTransactionsFactory gained the nine built-ins it was missing: transferOwnership, controlChanges, ESDTNFTAddURI, stopNFTCreate, transferNFTCreateRole, unsetBurnRoleGlobally, registerAndSetAllRolesDynamic, changeSFTToMetaESDT, updateTokenID.

Concurrency & resilience

CircuitBreaker now enforces a single in-flight probe in the half-open state — the old behaviour let a burst of callers all punch through, which defeated the point. NonceManager uses a proper FIFO Completer-queue mutex and refuses to release nonces that were already committed on-chain. AccountAwaiter and Paginator dedup is keyed correctly now; backoffs cap at the remaining timeout instead of sleeping past it. There's a new RequestThrottle token-bucket utility for smoothing bursts against rate-limited endpoints (API is ~30 rps per IP).

TransactionWatcher accepts optional numShards + roundDuration + awaitCrossShardCompletion flags. When set, it waits for the chain's completedTxEvent / SCDeploy / signalError log before returning — no more premature "success" snapshots for cross-shard SC calls.

Wallet & accounts

Keystore parsing rejects non-v4 / wrong-cipher / wrong-kdf at load time instead of throwing downstream with a confusing message. ScryptKeyDerivationParams.permissive() accepts weaker parameters from external wallets but still requires n >= 1024. Mnemonic derivation and the BIP-39 passphrase are NFKD-normalised now (new dep: unorm_dart) — this matters for non-ASCII passphrases. Account.fromMnemonic disposes the mnemonic in finally. Signature.fromBytes rejects non-64-byte inputs. Bech32Encoder rejects mixed-case strings per BIP-0173.

IAccount picks up prefersHashSigning, signAsGuardian, and signAsRelayer — the minimal surface a controller needs to support hardware and remote signers without hard-coding the key material.

Codegen

Queries that return a struct, an enum, or a list of them used to crash at runtime because the generated fromAbi path only handled primitives. They work now, including List<Struct> via (result.typedValues[i] as ListValue).elements.map(...).toList(). Reserved-word parameter names (new, function, class, etc.) get sanitised. Unused imports are gone. example/cookbook/generated/pair regenerates analyzer-clean.

Core types

Address equality now includes the HRP (two addresses with identical bytes but different hrp are not equal — they represent different networks), and AddressComputer.computeContractAddress propagates the deployer's HRP instead of hard-coding "erd". Transaction.data and Message.bytes return defensive / unmodifiable views so callers can't mutate the source. Balance gained *, ~/, %, and ratioTo. Numerical toBytes() methods now return fresh allocations instead of shared mutable singletons. AccountStorage picked up ESDT key-prefix helpers: esdtEntry, esdtRolesEntry, esdtLastNonceEntry, entriesWithPrefix.

Mnemonic-from-keystore

Three new public entry points for integrators that need to recover the mnemonic directly from a kind == "mnemonic" keystore:

• UserWallet.loadMnemonic(path, password) — reads a keystore file and returns the decrypted Mnemonic.
• UserWallet.decryptMnemonic(json, password) — same thing, but from an already-parsed JSON map.
• UserWallet.decryptMnemonicBytes(json, password) — returns the raw UTF-8 bytes of the mnemonic phrase, so external libraries can build their own wrapper without going through the Mnemonic class.

Breaking changes

• Address == / hashCode include the HRP.
• Signature.fromBytes / .fromUint8List reject non-64-byte inputs.
• IAccount has three new required members: prefersHashSigning, signAsGuardian, signAsRelayer.
• SendTransactionsResult adds an outcomes field.
• Transaction adds innerTransactions.
• Transaction.data and Message.bytes are no longer mutable.
• TransactionComputer.applyGuardian throws StateError when replacing a different guardian (instead of silently overwriting).

1.0.1 – 2026-04-16

Security

• Transaction fee calculation now uses pure integer arithmetic instead of lossy double multiplication, matching mx-chain-go behaviour for gas prices exceeding 2^53.
• ProtoSerializer._serializeValue rejects negative BigInt values at runtime instead of silently producing malformed hex.
• Address.hashCode uses FNV-1a with & 0x7FFFFFFF mask, preventing unbounded integer growth on web targets.
• Balance.fromEgld and ManagedDecimalValue.fromDouble use toStringAsFixed to eliminate IEEE 754 floating-point noise before parsing.
• Ed25519Crypto.generatePublicKey now zeros extracted seed bytes in a finally block, matching the pattern already used in sign.
• ListBinaryCodec.decodeTopLevel guards against zero-progress decoding loops that could cause infinite loops / OOM.
• Address.fromHex validates decoded byte length at runtime (not just via debug assert).
• BooleanBinaryCodec and OptionBinaryCodec marker buffers now return fresh allocations instead of shared mutable singletons.
• UserSecretKey.generate rejects all-zeros and all-0xFF seeds from Random.secure().

Fixed

• SmartContractResult.fromJson no longer throws FormatException when a network response returns a numeric value field (Gateway and some API shapes emit value: 0 as int).
• Generator models_generator.dart now emits the enum-discriminant guard as a braced block so regenerated code stays analyzer-clean under curly_braces_in_flow_control_structures.
• Applied the same block-style fix to the committed generated output under example/cookbook/generated/.

Changed

• Removed the arbitrary max-scale-77 restriction from ManagedDecimalBinaryCodec.encodeNested to match encodeTopLevel and the Rust SDK.
• Added @visibleForTesting BinaryCodec.resetCache() to allow test isolation of the codec singleton.
• NativeSerializer._toBigInt uses BigInt.from(value) directly for doubles instead of the truncating BigInt.from(value.toInt()).
• Transaction.copyWith accepts an optional newData parameter.
• Nonce.operator - throws ArgumentError at runtime if the result would be negative, instead of relying on a debug-only assert.
• Added ScryptKeyDerivationParams.permissive() constructor for keystore import/decryption, accepting weaker KDF parameters from external wallets. EncryptedData.fromJson now uses it.
• Address.getShardOfAddress uses integer bit-scan instead of floating-point log for the shard mask computation.
• Codebase-wide dart format sweep to satisfy the dart format --set-exit-if-changed CI gate.

1.0.0 – 2026-04-12

Fixed

• Hardened Address._extractHrp against malformed Bech32 strings where '1' appears at index 0.
• TransactionVersion values parsed from network responses (Transaction.fromPlainObject, TransactionOnNetwork.fromApiResponse) now go through a runtime-validated factory that rejects value <= 0 even in release builds.
• CircuitBreaker now resets _halfOpenSuccessCount when transitioning half-open → open on failure, preventing state leakage across rapid open/half-open cycles.
• Fixed two's complement encoding for negative values in NumericalValue.toTopBytes() -- was missing +1 carry propagation.
• Fixed BigIntValue.toBytes() sign extension -- positive values with high bit set now get 0x00 prefix.
• Fixed ProtoSerializer zero-value encoding from [0x00, 0x00] to [0x00], correcting transaction hash computation.
• Fixed ManagedDecimalBinaryCodec nested decode/encode for fixed-scale types -- payload offset was off by 4 bytes and length prefix was missing.
• Fixed ManagedDecimalSignedValue.fromDouble / .fromString -- was always throwing CastError due to parent-to-subclass cast.
• Fixed ManagedDecimalValue.toDecimalString() sign loss for values between -1 and 0.
• Corrected Option top-level encoding to omit marker byte (None = empty, Some = raw inner value).
• Fixed NativeSerializer variadic argument handling -- cardinality check and index-based access both failed for variadic endpoints.
• Fixed TransactionStatus.isFinal from !isPending to isExecuted || isFailed || isInvalid || isRecalled -- previously incorrectly classified not-executable-in-block as final (causing watchers to stop early), and classified recalled as non-final (causing infinite polling).
• Fixed TransactionWatcher to use injected NetworkProvider instead of raw Dio with hardcoded URL.
• Fixed UserPublicKey.toAddress(hrp:) -- was silently ignoring the hrp parameter.
• Fixed ArgSerializer.stringToBuffers returning [Uint8List(0)] for empty input instead of [].
• Fixed SmartContractCallFactory hardcoded TransactionVersion(1) -- now version 2 when guardian is set.
• Fixed SmartContractQueryRunner sharing a single EndpointResolver between query building and response parsing.
• Fixed Address.fromBech32 HRP extraction to use lastIndexOf for Bech32/BIP-0173 compliance.
• Fixed Address.fromBech32 static encoder with hardcoded 'erd' -- now creates encoder with extracted HRP.
• Fixed SmartContractOutcomeParser to pick last writeLog event instead of throwing on multiples.
• Fixed NativeSerializer to respect endpoint mutability and skip return-type decoding for write endpoints.
• Fixed NativeSerializer._toBytes from UTF-16 codeUnits to proper utf8.encode().
• Fixed NativeSerializer._convertNativeToAddress to accept any HRP, not just 'erd'.
• Fixed GatewayNetworkProvider response parsing to use correct field names and safe null handling.
• Fixed ResponseParser._stringToBytes to try base64 before hex, matching API response format.
• Fixed ResponseParser._isOptionalType from string comparison to proper type check.
• Fixed TransactionOnNetwork.fromApiResponse to handle non-base64 data fields gracefully.
• Fixed EndpointResolver._isVariadicParameter from fragile string matching to param.type is VariadicType.
• Fixed TypeFormulaLexer to accept hyphens in type identifiers (e.g. counted-variadic).
• Fixed token identifier validation to enforce 6-character hex ticker suffix.
• Fixed AccountAwaiter default timeout from 30s to 60s and added retry with exponential backoff.
• Fixed AddressValue.getShardId() from simple modulo to proper bit-masking algorithm.
• Fixed BigInt type name casing to match SDK convention.
• Fixed EndpointResolver to throw on duplicate endpoint names.
• Fixed ManagedDecimal scale validation (must be non-negative).
• Fixed SmartContractEventRunner to use bounded EventDeduplicator instead of unbounded Set.
• Fixed Paginator._fetch() race condition with proper request deduplication.
• Input validation across infrastructure layer (circuit breaker, cache, batch, pagination).

Changed

• TransactionStatus now includes executed, notExecutable, and recalled statuses.
• SmartContractEventRunner subscriptions now return StreamSubscription for proper lifecycle management.
• WebSocketEventStream reconnection uses exponential backoff with jitter.
• AccountOnNetwork fields (nonce, balance, address) are now required.
• TransactionOnNetwork adds null-safe access for optional API fields.
• EnumValue/ExplicitEnumValue discriminant encoding standardized to u8.
• VariadicValues validates matching lengths between values and types.
• ArgumentEncoder.encodeTypedValues now expands variadic and composite types into separate arguments.
• Codegen: CallsGenerator no longer imports unused output types; fixes unused import warnings.
• Codegen: generated files now include GENERATED CODE - DO NOT MODIFY header.
• Codegen: enum fromAbi uses discriminant lookup instead of array index.
• Codegen: toJson() properly serializes nested structs, enums, BigInt, and Address fields.

Added

• not-executable-in-block and recalled transaction status support.
• CompositeValue.isEmpty / isNotEmpty convenience getters.
• TokenTransferType support in code generator type mapper.
• Address.isZero getter for zero-address checks without allocating a new Address.zero().
• TransactionAwaitingOptions.maxConsecutiveErrors -- aborts polling after repeated fetch failures with exponential backoff.
• TransactionAwaitingOptions.patience -- waits for block finalization after status reaches final state.
• AbiEndpoint.mutability / isPure / isReadonly -- preserves raw mutability ('pure' vs 'readonly' vs 'mutable').
• NetworkProvider.getDefinitionOfFungibleToken, getDefinitionOfTokenCollection, and getNonFungibleToken -- rich token metadata queries on the API provider (Gateway surfaces these via UnsupportedError, matching the other metadata endpoints).
• NetworkProvider.getBlock, getLatestBlock(shard:), and getHyperblock(nonce) -- block and cross-shard hyperblock queries. Gateway getLatestBlock two-hops through network/status/<shard> to resolve the current nonce.
• BlockOnNetwork and HyperblockOnNetwork types with schema-tolerant fromJson factories that accept both API and Gateway field aliases.
• Typed SmartContractResult parsed eagerly from the @<returnCode>@<returnData>... payload. TransactionOnNetwork.smartContractResults is now List<SmartContractResult>? (was List<Map<String, dynamic>>?).
• NonceManager -- stateful forward-only nonce allocator with mutex-serialized next(), release/reuse queue, applyNonce(Nonce) floor, and resync() that never goes backwards. Use it for bulk sends without round-tripping getAccount between each transaction.
• TransactionDecoder -- pure, never-throwing parser that turns a Transaction into a sealed DecodedTransaction hierarchy: NativeEgldTransfer, EsdtTransfer, NftTransfer, MultiTransfer, ContractCall, UnknownTransaction. Supports inner contract calls nested after ESDT/NFT/MultiESDT transfer prefixes.

Changed

• TransactionAwaitingOptions defaults: polling 400ms, patience 800ms, timeout 60s -- tuned for Supernova block times.
• SmartContractEventRunner.streamEvents / streamAllEvents default polling lowered from 2s to 500ms for Supernova 600ms blocks.
• CacheManager caps the number of cache instances to prevent unbounded growth from high-cardinality endpoints.
• _encodeSignedTopLevel allocates directly into Uint8List instead of spreading through a temporary list.
• base_controller guardian/relayer checks use isZero getter instead of allocating Address.zero() per call.
• Codegen CallsGenerator._collectCustomTypes now includes output types to avoid missing imports for custom return types.
• Codegen NameSanitizer keyword lookup is now case-insensitive and includes function consistently with KeywordSanitizer.

Security

• PubkeyDecryptor zeros secret key bytes in a finally block after decryption.
• ScryptKeyDerivationParams now validates KDF parameters per RFC 7914: n must be power of 2 and ≥ 16384, r ≥ 8, p ≥ 1, dklen = 32. Prevents weak-parameter keystores from decrypting silently.
• EncryptedData.fromJson surfaces invalid KDF parameters from untrusted keystore input as FormatException rather than passing through silently.

1.0.0-beta.2 – 2025-12-20

Fixed

• Fixed dangling library doc comments in codegen files.
• Updated package description to meet pub.dev length requirements.
• Replaced flutter_lints with lints for pure Dart compatibility.

1.0.0-beta.1 – 2025-12-08

Added

• First public release of the MultiversX Dart/Flutter SDK and CLI.
• Wallet tooling covering mnemonic, PEM, and keystore workflows.
• Transaction builders for EGLD, ESDT, NFT, SFT, and MetaESDT transfers.
• High-level smart-contract controller with ABI-driven calls, queries and events.
• Gateway and REST network providers plus WebSocket event streams.
• ABI codecs for primitives, collections, composites, and protocol-specific special types.
• Code generator capable of scaffolding controllers, DTOs, and tests from ABI files.
• Cookbook examples and wallet walkthroughs demonstrating real integrations.
• 900+ automated tests spanning core types, infrastructure, serializers, and integration scenarios.